Peterbilt 379 Dynaflex 90 Degree Pickett Style Exhaust Elbow *Image Shows 5" Reduction. Choosing Full Diameter Option Will Eliminate The Reduction On The Bottom Of The Elbow. Peterbilt 379 90 Degree Pickett Style Exhaust Elbow Fits Peterbilt 379 Trucks Elbow Tapers Down On Top Which Allows Stan... See More